Folder for wrapping machines



April 29, 1924.

G. W. PROUTY ET AL FOLDER FOR WRAPPING MACHINES Filed May 9, 1923 2 Sheets-Sheet 1 /2 I Glnvenzofs; W y

April 29, 1924. 1,492,104

G. W. PRQUTY ET AL FOLDER FOR WRAPPING MACHINES Filed May 9, 1923 2 Sheets-Sheet 2 Ln: fnvenaons'; 2 5? 59 02- 3 Patented Apr. 29, W24.

GEORGE W. PROU'I'Y, F BOSTON, AND JASPER DERBY, OF MEDFOBID, MASSAGHUSETTS; SAID DERBY ASIGNOR TO ANDREW TERKWEN, OI BOSTON, MASSACHUSETTS.

FOLDER F03. It. PING monmm.

Application filed May 9, 1928. Eerie] Ho. @2658.

To all whom it may concern.-

Be it known'that we, GEORGE W. Pnou'rr and JAsnER-DERRY, citizens of the United States, residing at Boston, count of Suffolk, State of Massachusetts, an at Medford, county of Middlesex, State of Massachusetts, res ectively, have invented a certain new an useful Improvement in F olders for Wrapping Machines, of which the W following is a specification, reference being had therein to the accompanying drawings.

This invention relates to wrapping machines of the general type shown and described in an application for Letters Patl il ent, filed June 21, 1921, by Geor e Prouty, Serial No. 479,410, and a apted primarily for wrapping annular objects, such, for example, as automobile tires, coils of wires, etc. a

The present invention has for its objects to provide improved means for folding the edge or edges of the strip of pa er or other wrapping material applied by t e machine, and especially, althou h not exclusively, to as provide means for folding the opposite ed of the strip in o posits directions for t e purpose more ful y explained in the application for Letters Patent, filed June 10,

1922, by Andrew Terkelsen, Serial No.

The foregoing and other objects of the invention, together with means whereby the same may be carried into efiect, will best be understood from the following description of one form or embodiment thereof illustrated in the accom anying drawings. it will be understood, ticular construction described and shown has been chosen for illustrative pur oses merely, and that the invention, as 'de ed by the claims hereunto a pended, may be otherwise practiced wit out departure from. its spirit and scope.

in said drawings:

Fig. 1 is a front elevation of the complete machine.

Fig. 2 is an enlarged front elevation of the pa er folder.

' ig. 3 is a plan view thereof.

Figs. 4 and 5 are sections "taken substantially on the lines 4, a and 5, 5, Figure 2, res ectively.

ig. 6 is a fragmentary detail view of a portion of the wrapped strip.

Fill

all)

' j ournalle owever, that the par Referring to Figure 1, the frame of the machine comprises a base and a oke 16 which is ivotally mounted on a s ft 17 d in an upright 18 rising from the base 15. The yoke 16 is provided with guide rollers 19 for an annular shuttle 20 which is rotated by a driving member in the form of a friction disk 21 secured to the shaft 17 and driven through connections (not shown in detail) under the control of a starting treadle 22 from an electric motor 23. The tire or other work W to be wrapped is held by a weighted roller 14 u on work supporting rollers 24 (only one 0 which is shown in W. Fig. 1) which are driven throughconnec tions generally indicated at 25 from the motor 23, the arrangement bein such that the work W will be turned re atively slowly with respect to the speed of rotation of the shuttle 20. Said shuttle is formed with a hinged segment 26 normally-closing a gap through which the work W may be inserted, while the yoke 16 may be adjusted about the axis of the shaft 17 to center the shuttle 20 with res ct to annular objects of difierent sizes, said yoke being counterbalanced by a spring 27 and being locked in adjusted position by means of a clamp 28 carried by an upright 29 rising from the base 15.

The wrapping material, preferably in the form of a continuous strip S of aper, is supplied from a roll 3Q su ported y a reel or spindle 31 carried by t e yoke 16. Said aper passes from the roll throu h the olding device hereinafter, more fu y described, and designated as a whole in Figtill ure 1 by the numeral 33 and thence over a guide plate 3% to the shuttle 20. Said shuttle 20 comprises an annulus having on one face a circular series of rollers 35 about which the strip S is wrapped'when the shuttie is rotated, said strip being fed from the shuttle about a guide roller 36 to the work Between the shuttle 2i) and the source of supply 30 there is provided a cutting mechanism comprising a knife 37 cooperating witha portion of the guide plate 34 to sever the strip S when a snficient length thereof has been wound around the shuttle rollers 35 to complete the wrapping of the work W. The nun 3? is automatically actuated, after a nedetermined number of retations of the riving dish 21, by a counting mechanism 38 actuated at each rotation lldd Mil;

' edge of the strip of said driving disk by a cam projection 39 thereon, said counting mechanism being manually adjustable in accordance with the size of the articles wrapped.

From the foregoing the nature, location, and function of the parts referred to will be sufficiently understoodfor the purposes of the present case. With the exception of those hereinafter described, and in so far as the others enter into combination therewith, as pointed out in the claims, these parts are not involved in the present invention and may be of any suitable construction and arrangement.

Referring now to Figures 2 to 5, the folding device, to which the present case-relates, is preferably carried by a separate plate 40 secured (as by volts 41, shown in Figure 1) to the yoke 16. Journalled on studs projecting laterally from the plate 40 are guide rollers 42, 43, 44 and 45 over which the strip S passes between a tension device 32 and the guide plate 34. The guide rollers 42 and 43 engage the strip S at opposite sides to guide the same accurately to ,the first folding device, which is located between the guide rollers 43 and 44. Said folding device comprises a sleeve 46 secured, as by a set screw 47,v to a bolt 48 projecting laterally from the plate 40. The sleeve 46 is formed adjacent its inner end with a flange 54 and.

at its outer end is provided with a collar 52, adjustably secured thereto by a set screw 520, which collar enga es and guides the outer S. At the inner ed e of said strip, immediately adjacent the ange 54, said sleeve carries a roller 49 mounted for rotation about an axis substantially perpendicular to the axis of the stud 48 and sleeve 46 and to the path of the strip S, upon a stud or pin 50 projecting from said sleeve. The inner end of the roller 49 is of compound curvature, being preferably of substantially pseudo-spherical shape, so that, as the strip S is drawn past the same, the adjacent edge of said strip will be turned to form a fold a which is subsequently flattened down upon the surface of the strip by the passage of the latter about the guide roller 44. The flange 54 is suitably cut away to receive the enlarged inner end of the roller 49, and the sleeve 46 is also cut away immediately adjacent said roller 49 to-form a recess 51 which receives the folded ed e a of the strip. The sleeve 46-is also rovi ed adjacent the recess 51 with a s ace parallel stud 53 rojecting from the ange54 and between w ich and the body of the sleeve the strip passes. The second folding device, which is located between-the ide rollers 44 and 45, is similar to'that ust described and comprises a sleeve 55 secured by a set screw. 56 to a stud 57 projecting from the plate 40, said sleeve having a-flange 58 adjacent its inner end and a roller 59 rnounted on a pin 60 to rotate about an axis substantially erpendicular to the axis of the sleeve 55 and stud 57 and to the path of the strip S, the roller 59 being pseudo-spherical at its inner end, adjacent which the sleeve 55 is formed with a recess 61, and provided with a guide pin 62 projecting from the flange 58. In this instance,

however, the roller 59 is carried by the outer end of the sleeve 55, so as to en age the opposite edge of the strip S. from t at enga ed by the roller 49 and turn said opposite e ge so as to form a fold b which is flattened down by the subsequent passage of the strip about the guide roller 45.

It will be observed that the sleeves 46 and 55 engage the strip S at opposite sides, so that the rollers 49 and 59 operate to turn the opposite edges of the strip in opposite directions, the fold a being outward, with respect to the subsequently wrapped strip, and the fold I) being inward. The folds a and b of adjacent stri s are therefore opposed and tend to inter ock, as indicated in Figure 6, thereby preventing the separation of the strips and the exposure of the article wrapped.

It will be observed that by releasing the set screws 520 and 56 the collar 52 'and sleeve 55 may be lon itudinally adjusted latof the guide rollers 42, 43, 44, and 45 and ofthe sleeves 46 and 55 of the foldin devices are all parallel to one another, an prefer: ably perpendicular to the plate 40, the recise arrangement of these parts on said p ate may be "aried in accordance with the requirementsof the particular machine, it being necessary only that the sleeves 46 and 55 engage the strip at opposite sides, and that the strip be accurately guided to t e sleeve 46, from said sleeve 46 to the sleeve 55, and from the latter sleeve, in such a manner as tocause the proper engagement of the edges of said strip with the rollers 49 and 59 and the subsequent flattening of the folds resulting from theturning of the edges of the strip by said rollers. To the latter end a light tension is preferably applied to the strip, this, in the present instance, being accomplished by means of a leaf sprin 65 secured to the sleeve 46 and eng 'ng tfle strip as it passes over the guide ro lfia r 43.

Certain features shown and referredto herein are covered by claims of other applications for Letters Patent, as follows:

As to the machine as a whole, application Serial No. 47 9,410, above referred to;

As to [the driving mechanism, application Serial No. 637,655, filed May 9, 1923, by ourselves and Philip 0. Tengberg; I

As to the means for supporti and adjustin the shuttle-carrying yoke, erial No. 637,65 filed May 9, 1923, by ourselves;

prising a frame, a work support thereon, an 4 a spirally wound strip comprisin As to the shuttle in combination with certain cooperating parts, Serial No. 637,618, filed May 9, 1923, by Jasper Derry; and

As to the work supporting rollers and associated parts, Serial No. 637 ,658, filed May 9, 1923, by Geor IV. Prouty.

Having thus escribed our invention, we claim- 1. In a wrapping machine comprising a work support, an annular shuttle through which the work is adapted to be moved, means for moving said shuttle about its center, and means removed from the shuttle for supplyin wrapping material in a continuous strip; aevice between said supplying means and shuttle for folding the edge of said strip of material.

2. In a machine for wrapping objects with a spirally wound strip of material and comprising a frame, a work support thereon and an annular shuttle; a foldin device located on said frame for folding t e edge of said stri 3. In a machine for wrapping objects with a spirally wound stri of material and comprising a frame, a wor su port thereon, and an annular shuttle; a fol ing device located on said frame and comprising means for folding both edges of said strip during the passage thereof of said shuttle.

4. In\ a wrapping machine comprising a work support, an annular shuttle through which the work is adapted to be moved, and means for feeding a strip of wrapping material from the shuttle around said work, a plurality of rollers disposed with their axes substantially perpendicular to the path of said strip of material and adapted to fold over the ed s of the material prior to winding thereo about the work.

5. In a machine for wrapping objects with a spirally wound strip of material and comannular shuttle, and means for supplying said material to said shuttle; a roller mounted on said frame and dis osed with its axis substantially er endicu ar to the path of said strip for fol ing the edge thereof.

6. In a machine for wrapping objects with of material, a folder a roller aving a substantially pseudo-Sp erical portion adapted to turn the edge of said strip.

7. In a machine for wrapping objects with a spirally wound strip of material, a folder comprising a stud over which said strip passes an a roller carried by said stud at the'edge of the strip with its axis substantially perpendicular to the axis of said stud.

8. In a machine for wrapping objects with a spirally wound strip of material and comprising a frame, a work support, an annular shuttle, and means forsu plying said material to said shuttle; a fol er on said frame between said shuttle and said su plying means, and means whereby said foldhr may be adjusted transversely of said strip.

9. In a machine for wrapping objects with a spirally wound strip, a folding device comprising members arranged to engage said strip at opposite sides and provided with means for turning the opposite edges thereof in opposite directions, and devices for guiding said strip to one of said members, between said members, and from the other of said members.

10. In a machine for wrappin objects with a spirally wound strip, a fo ding device comprising a member over which said strip is guided,'said member havi a recess adjacent the edge of said strip an a roller extencfin laterally therefrom adjacent said recess, said roller having a portion adapted to turn the edge of said strip into said recess.

11. In a machine for wrappin objects with a spirally wound strip, a fo ding device comprising a member aving a spaced parallel stud between which and a portion of the surface of said member said stri is guided, said member having a recess a jacent the edge of said strip and a roller extending laterally therefrom adjacent said recess, said roller having a portion adapted to turn the edge of said stripinto said recess.

12. In a machine for wrappin objects with a spirally wound strip, a fo ding device for turning the edge of said strip, means for guiding said strip to said folding device, and a spring for pressing said strip against said iding means to apply tension thereto as it is folded.

In testimony whereof we afix our signatures.

GEORGE W. PROUTY. I JASPER DERBY. 

